PR-680 Digital Protection Relay
Microprocessor-Based Protection Relay for Medium Voltage
Overview
The PR-680 Digital Protection Relay by Arian Kelid Pars is an advanced microprocessor-based protection and control relay designed for medium-voltage distribution systems. Developed for feeder, transformer, and circuit breaker protection, the PR-680 provides comprehensive protection functions, intelligent monitoring, event recording, and seamless integration with modern substation automation systems.
Built on high-performance digital processing technology, the PR-680 offers fast protection response, flexible protection settings, and high operational reliability. Its user-friendly interface, programmable logic, and extensive communication capabilities make it an ideal solution for utility substations, industrial facilities, and critical power infrastructures.
The relay supports comprehensive protection schemes together with advanced monitoring and recording functions, allowing operators to improve system reliability, reduce outage time, and simplify maintenance.
Designed in accordance with international IEC standards, the PR-680 integrates easily with SCADA and Energy Management Systems (EMS), providing secure and reliable communication for modern smart grid applications.
Key Features of PR-680
* PR-680 Microprocessor-Based Digital Protection Relay
* Comprehensive feeder, transformer and circuit breaker protection
* High-speed fault detection and protection
* User-friendly HMI with intuitive operation
* Flexible and programmable protection settings
* Event, fault and disturbance recording
* Continuous power system monitoring
* SCADA and Dispatch Center integration
* IEC communication protocol support
* Auto-Reclose functionality
* Local and remote monitoring
* Remote control capability
* Industrial-grade hardware with high reliability
Protection Functions
The PR-680 supports a comprehensive range of protection functions, including:
* Overcurrent Protection
* Earth Fault Protection
* Undervoltage Protection
* Overvoltage Protection
* Frequency Protection
* Directional Protection
* Breaker Failure Protection
* Auto-Reclosing
* Feeder Protection
* Transformer Protection
Monitoring & Control
* Event Recording
* Fault Recording
* Disturbance Recording
* Remote Monitoring
* Remote Control
* SCADA Communication
* Protection Settings Management
Communication Protocols
* IEC Communication Protocols
* Modbus
* SCADA Integration
* IEC Standards Compliance
Applications
The PR-680 Digital Protection Relay is suitable for:
* Medium-voltage substations
* Distribution networks
* Outgoing feeders
* Transformer protection
* Circuit breaker protection
* Oil & Gas facilities
* Power plants
* Substation automation systems
* Industrial plants
* Smart Grid applications
Advantages of PR-680 Digital Protection Relay
* Designed and engineered by Arian Kelid Pars
* Optimized for modern medium-voltage distribution systems
* High protection accuracy and reliability
* Easy configuration and operation
* Reduced maintenance requirements
* Improved power system reliability
* Suitable for utility and industrial applications
* Long service life with industrial-grade components
| NO | Parameter | Specification | |
| 1 | Model | PR-680 | |
| 2 | Product Type | Microcomputer Integrated Protection Relay | |
| 3 | Application | MV Switchgear, Feeders, Transformers, Motors, Capacitors | |
| 4 | System Voltage | Up to 110 kV | |
| 5 | Auxiliary Supply | 48 VDC ±20% | |
| 6 | CT Input | 1A / 5A Selectable | |
| 7 | VT Input | 100V / 400V Selectable | |
| 8 | Frequency | 50 Hz | |
| 9 | Digital Inputs | 19 Passive DI | |
| 10 | Relay Outputs | 8 NO + 8 NC Contacts | |
| 11 | Communication Ports | RS485 + Ethernet | |
| 12 | Communication Protocols | Modbus RTU, IEC 60870-5-104 | |
| 13 | Event Records | 512 Events + 512 SOE | |
| 14 | Disturbance Recorder | 32 Fault Waveforms | |
| 15 | LED Indicators | 7 Fixed + 5 Programmable LEDs | |
| 16 | HMI | English | |
| 17 | Mounting | Panel Mount | |
| 18 | Operating Temperature | -10°C to +55°C | |
| 19 | Protection Functions(ANSI) | 50, 51, 50N, 51N, 67N, 50BF, 79, 27, 59, 59N, 81H, 81L, 46, 49, 32R, 50SEF, 37, 48, 66 | |
| 20 | Motor Protection | Locked Rotor, Undercurrent, Start Limitation | |
| 21 | Reclosing | 1~4 Shot Auto Reclose | |
| 22 | Directional Protection | Directional OC & Earth Fault | |
| 23 | Earth Fault Protection | Standard + Sensitive Earth Fault | |
| 24 | Monitoring Functions | PT Failure, Control Circuit Failure, Self-Diagnostics | |
| 25 | Standards | IEC 60255, IEC 60870 Series | |